I just picked up a Dodge Ram 350 Diesel to pull my 33' 7500# TT. My question is about truck tire pressure. Tires are 265/70R17 "E"s, and the door panel says inflate based on load. It says:

Minimal Load, 50F/40R
Max Load, 60F/75R

So that's easy with the truck alone, but what about with a TT with the tongue weight and the load distribution bars that push weight the front end? I have no idea if where in that inflation range I should be.

Any recommendations on how to best inflate the truck tires when towing?

I would at least start with 5 PSI under Max reccomendation. This will allow wiggle room for heat and/or elevation changes. Like previous posts allude to, take a visual on tire wear after travel and adjust as needed.

Try the max presure, then tow, at your first fuel stop, check the tires and if you have a dark line on the outer edge on the tire tread, deflate 5 psi and check on you next fuel stop. You don't want a dark line on the outside edge of the tire tread. If you aren't sure what I mean. Inflate the rear tires to max and go for a drive without a trailer, you will see the dark line on the tread that will be about 1/2" to 3/4" wide.

I run 60 psi in the front and 65 in the rear with my current E range tires when towing.

Put 65# in front & 75# in rear......hook up trailer and then go get it weighed so you know what axle/tongue weights you are dealing with. You will also know what the trailer axle weight is.....then you can inflate the trailer tires to correct pressure/load.

In all my Ram duallys, I have run 80 psi up front regardless of load, 80 psi in the rear pulling the fifthwheel, 45 psi in the rear when not pulling the fifthwheel. Rotate every 7,500 miles, and get very even wear.

SidKaye wrote:Is it a 350 or 3500 dually??
Is it a 3500 single rear wheel?

Sidney

265/70R17 is pretty fat for a dually

Here is a tire weight rating table. I believe all tire manufactures have one. If you know your exact loaded weights you can look up the proper PSI. SRW your most likely looking at full 80 psi rear, 65 front.